CN104735746B - It is used for transmission the method for MPLS header, the method for establishing the path MPLS and the method for executing the switching of the path MPLS - Google Patents
It is used for transmission the method for MPLS header, the method for establishing the path MPLS and the method for executing the switching of the path MPLS Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/34—Modification of an existing route
- H04W40/36—Modification of an existing route due to handover
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/50—Routing or path finding of packets in data switching networks using label swapping, e.g. multi-protocol label switch [MPLS]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/22—Alternate routing
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Abstract
The present invention relates to be used for transmission the method for MPLS header, the method for establishing the path MPLS and the method for executing the switching of the path MPLS.It include: to be connected to the measurement radio signal of mobile node B 1 of A1 and provide the information of the radio signal about measurement to the Label Switch Router C1 for being indirectly connected to A3 through another Label Switch Router E to the method that the path MPLS established between node A1 and node A3 executes switching;If C1 need to be switched based on measured radio signal determination by it is from C1, need the switching command for the information being redirected through Label Switch Router C2 to be transferred to E through mobile network's controller H of radio network part comprising the path MPLS;MPLS is requested dependent on received switching command to be transferred to C2 from E;Handoff parameter is transferred to C2 from C1;LTE radio bearer is established between B1 and C2;The more newer command of identifier from C2 is transferred to E through H and establishes the path MPLS between A1 and A3 through E, C2 and B1.
Description
The application is that submit on April 13rd, 2011 entitled " is used for transmission the method for MPLS header, for establishing
Point of the application for a patent for invention 201180070518.7 of the method in the path MPLS and the method switched for executing the path MPLS "
Case application.
Background technique
The present invention relates to one kind via radio circuit --- especially long term evolution (LTE) network, by multi-protocols
The method that exchange (MPLS) header is transmitted to second node from first node.Moreover, the present invention relates in first node and second
The method that the path multi-protocol exchange (MPLS) is established between node, this method pass through mobile network by multi-protocol exchange (MPLS)
Wireline side and the radio network part that passes through mobile network by long term evolution (LTE) network wireless charge carrier.This
Another theme of invention is for the multiprotocol label switching established between first node (A1) and second node (A3)
(MPLS) method that path executes switching, this method by multi-protocol exchange (MPLS) by the wireline side of mobile network and
The radio network part for passing through mobile network by long term evolution (LTE) network wireless charge carrier.
Known multiprotocol label switching (MPLS) network forms the basis of the data network of cable network operator.These
MPLS network is used for many purposes, such as transmission, the transmission of ethernet communication amount of the IP traffic etc..In recent years, MPLS net
Network has been extended to current high resiliency rank, and can restore from fault condition within the time less than 50 milliseconds.
MPLS is quickly re-routed, is an example for this extension for the MPLS RSVP-TE extension re-routed.
Moreover, forth generation network such as long term evolution (LTE) forms the basis of wireless network.LTE network is concerned only at present
In the IP traffic.As wireless network, the main feature of these networks first is that handle ambulant ability, medium-long range section
Point is not only restricted to specific antenna via the node that wireless interface connects but can be moved to another antenna from an antenna,
Without losing the connection with other networks.Another importance is switching capability, and wherein active data connection can be from a day
Line is moved to another antenna without interfering data flow.
The factor for there are one group two kinds of networks (MPLS and LTE) being pushed away closer to each other.Firstly, achievable with LTE
Bandwidth is enough to provide MPLS connection service to remote node although high unlike about MPLS.Secondly, network is from pure wired
Converged network is wirelessly converged to pure.The use that can be transmitted the converged network of the connection service using MPLS and LTE allows newly
The market opportunity, especially if with can simplify if the mobility scheme of the deployment of the MPLS network of remote location is consistent.
Therefore, the purpose of the present invention is to provide improved MPLS connection service to the remote location accessed via LTE network,
Efficiently to combine MPLS and LTE network.
Summary of the invention
It is an advantage of the invention to provide one kind via radio circuit --- especially long term evolution
(LTE) network, the method that multiprotocol label switching (MPLS) header is to efficiently transmit second node from first node, the party
Method has the data transmission capacity reduced in view of radio circuit compared with wireline communication network.
The purpose of the invention is to realize by the following method, and this method is via radio circuit --- it is especially long
Multiprotocol label switching (MPLS) header is transmitted to second node from first node by phase evolution (LTE) network, and this method includes
Following steps: the size by reducing multiprotocol label switching header modifies multiprotocol label switching header, and using dedicated
Modified multiprotocol label switching header is transmitted to described from the first node by air interface by radio bearer
Two nodes.
Bandwidth can be advantageously saved in the transmission of MPLS header as a result, so that reduced data transmission capacity is enough reality
Now via wireless radio circuit high efficiency of transmission MPLS data.Preferably, the size of multiprotocol label switching header can
The position MPLS label by removing multiprotocol label switching header is reduced, this is because air interface use is carried via radio
The one-to-one correspondence of body is not needed via MPLS labels of the air interface transmission.
Another purpose or another embodiment according to the present invention, by increasing to the multiprotocol label switching header
Add a serial number, modifies multiprotocol label switching header.It thus can be advantageously, received entity can pass through analysis sequence
Number verifying received MPLS data integrality.Preferably, received entity can be dependent on the serial number institute is received
Data rearrangement.
According to a preferred embodiment of the invention, Xiang Suoshu multiprotocol label switching layer application encryption mechanism is to protect
The data transmitted.Preferably, the data transmitted are gone to modify in receiving node, for example, by the multiprotocol label
It exchanges header and increases MPLS labels, the MPLS label depends on the control of the modified multiprotocol label switching header
Preparative layer is configured;By dependent on the serial number rearrangement MPLS data;By removing serial number;And/or by institute
Received multiprotocol label switching header application decryption mechanisms, to restore initial MPLS header.The first node is described
One of second node preferably includes to provide the mobile node of mobile wireless function (for example, (individual digital helps by cellular phone, PDA
Reason) or the like), wherein another in the first node and the second node includes providing the road MPLS of MPLS function
By device (for example, MPLS label edge router (LER) or MPLS label Switch Router (LSR)).LTE network preferably includes to lead to
With forth generation network.
Another object of the present invention or another embodiment are that one kind is established between first node and second node
The method in the path multiprotocol label switching (MPLS), this method pass through the mobile network by multiprotocol label switching (MPLS)
Wireline side and pass through the radio network part of mobile network, the side by long term evolution (LTE) radio bearer
Method the following steps are included: the first movement node for being connected directly or indirectly to the first node be connected directly or indirectly to
LTE radio bearer is established between first Label Switch Router of the second node, first Tag switching will be come from
One identifier of router is transmitted to mobile network's controller of the radio network part, wherein the identifier
Including the sky about the path MPLS wait be used between the first movement node and first Label Switch Router
The information of middle interface carrier, and by using identifier information via LTE radio bearer in the first node and described
The path MPLS is partly established between second node.
Advantageously, mobile network's controller notice is embedded in the MPLS label edge routing of the wireline side of the network
Device (LER) or MPLS label Switch Router (LSR): should using which air interface carrier with by MPLS request via connecing in the air
Mouth forwards on radio net, so that the path MPLS/request and radio bearer are clearly assigned to each other.Preferably,
First Label Switch Router notifies mobile network's controller: the path MPLS that the identifier information is identified is
It is established, so that mobile network's controller is able to verify that and has built up the road MPLS by using assigned radio bearer
Diameter.Preferably, MPLS path request is initially generated by the first node, and wherein in the first node and described second
After the path MPLS between node has built up, the second node confirms the path MPLS to the first node.
Another object of the present invention or another embodiment are that one kind establishes MPLS between first node and second node
The method in path, this method is by multiprotocol label switching (MPLS) by the wireline side of mobile network and by drilling for a long time
The radio network part for passing through the mobile network into (LTE) radio bearer, the described method comprises the following steps: direct
Or it is indirectly connected to establish LTE radio load between the first movement node of the first node and the first Label Switch Router
Body;By an identifier from first Label Switch Router via a mobile network of the radio network part
Network controller is transmitted to another Label Switch Router for being connected directly or indirectly to the second node;By using described
Identifier exists via another described Label Switch Router, first Label Switch Router and the first movement node
The path MPLS is established between first node and second node, wherein identifier instruction is needed via first Tag switching
Router establishes the path MPLS, and wherein the identifier includes about wait be used for the first movement node and institute
State the information of the air interface carrier in the path MPLS between the first Label Switch Router.
Thus can advantageously, another described Label Switch Router (for example, in the wireline side of embedded network
MPLS label edge router (LER) or MPLS label Switch Router (LSR)) it is notified by mobile network's controller:
MPLS request should be routed about first Label Switch Router to establish via radio net towards the first segment
The air interface of point (or described first movement node).Preferably, MPLS path request is routed from another described Tag switching
Device is transmitted to first Label Switch Router, wherein the MPLS path request that first Label Switch Router will be come in
It associates with established MPLS carrier, and MPLS path request is forwarded to the first movement node, so that MPLS
Path/request and radio bearer are clearly assigned to each other.Preferably, described in the first Label Switch Router notice
Mobile network's controller: the path MPLS that the identifier information is identified has been established.Moreover, MPLS path request initially by
The second node generates, wherein after the path MPLS between the first node and the second node has built up,
The first node confirms the path MPLS to the second node.
Another object of the present invention or another embodiment are that one kind is built between first node and second node
The method that the vertical multiprotocol label switching path (MPLS) executes switching, comprising the following steps: by being connected directly or indirectly to
The first movement node of the first node measures radio signal, and to via between another Label Switch Router in succession
Information of the first Label Switch Router offer of the second node about measured radio signal is provided;If described
First Label Switch Router needs to switch based on measured radio signal determination, then will come from first Tag switching
The switching command of router is transferred to another described mark via mobile network's controller of the radio network part
Switch Router is signed, wherein the switching command includes what the path MPLS needed to be redirected via the second Label Switch Router
Information;Dependent on the received switching command of institute, MPLS is requested to be transferred to the second mark from another described Label Switch Router
Sign Switch Router;Handoff parameter is transferred to second Label Switch Router from first Label Switch Router;
LTE radio bearer is established between the first movement node and second Label Switch Router;It will be from described the
The more newer command of the identifier of two Label Switch Router is transferred to another described label via mobile network's controller and hands over
Change router;And it is moved via another described Label Switch Router, second Label Switch Router and described first
Dynamic node establishes the path MPLS between first node and second node.
It thus can be advantageously, MPLS switching be mainly provided in such a way that in the first movement node and described
Air interface is established between second Label Switch Router, and is next notified by mobile network's controller described another
A Label Switch Router: the path MPLS should be routed via the second Label Switch Router rather than first Tag switching
Device is routed.Preferably, dependent on a received identifier more newer command, another described Label Switch Router is then deleted
To the path MPLS of first Label Switch Router.
According to a preferred embodiment of the invention, via in the first movement node and first Tag switching
Router and/or the path MPLS established between the first movement node and second Label Switch Router lead to
It crosses according to the present invention for multiprotocol label switching (MPLS) header to be transmitted to the side of second node from first node
Method transmits multiprotocol label switching (MPLS) header.
These and other characteristics of the invention, feature and advantage will become from the detailed description provided with reference to the accompanying drawing
It is illustrated, the principle of the present invention has been illustrated by way of example in attached drawing.The explanation only for the purposes of illustration, does not limit of the invention
Range.The reference number being referenced below is referring to attached drawing.
Detailed description of the invention
Fig. 1 diagrammatically illustrates the MPLS network used according to the invention for being wirelessly connected such as LTE network.
Fig. 2 diagrammatically illustrates the schematic diagram of the protocol stack of MPLS frame according to the present invention and is used for transmission MPLS header
Method.
According to the first embodiment of the invention Fig. 3 is diagrammatically illustrated for establishing the process of the method in the path MPLS
Figure.
Fig. 4 diagrammatically illustrates the process of method of the second embodiment according to the present invention for establishing the path MPLS
Figure.
Fig. 5 diagrammatically illustrates the method for the switching for according to the third embodiment of the invention being used to execute the path MPLS
Flow chart.
Specific embodiment
The present invention will be described about specific embodiment and referring to some attached drawings, but that the present invention is not restricted to these is specific real
Scheme and attached drawing are applied, but is only defined by the claims.Described attached drawing is only as illustrative and not restrictive.In attached drawing
In, for illustration purpose, the size of some elements may be exaggerated rather than drawn to scale.
When addressing singular noun use indefinite article or definite article --- for example, one (" a "), one (" an ") or should
(" the ") --- in the case where, this includes the plural number of the noun, except non-clearly there is opposite explanation.
Moreover, the term first, second, third, etc. in description and claims is used to distinguish between similar component, it is not necessary to
So description one in order or time order and function order.It should be understood that the term so used is interchangeable in appropriate situations
, and the embodiment of invention described herein can be run by from other different sequences described herein.
Fig. 1 is diagrammatically illustrated by using according to the method for the present invention by MLPS technology and wireless connection such as LTE net
The network that network combines.
The method according to the present invention that the path MPLS is established between first node A1 and second node A3 is used for, and passes through
Using MPLS technology by two end systems (also referred to as first node A1 and second node A3) interconnection of network and at them
Between establish MPLS connectivity.By end system A1, A3 of MPLS connection communication, can be located at via mobile device or via solid
Locking equipment (being shown as F) (A1-A3-MPLS connection situation) connection first movement node B1 or the second mobile node B 2 at.
Method of the invention can also be used to only connect two nodes (being shown as A1 and A2) via mobile device.In these nodes
Each of will be connected to network operator using mobile device B1, B2 of themselves.The behavior is similar to the A1-A3-
MPLS connection situation, however node E is connected to D2 rather than F.
According to function expected from end node A1, A2, from the viewpoint of the end node A1, A2, first movement node B1 and
Second mobile node B 2, which is served as, makees MPLS label edge router (LER) or MPLS label Switch Router (LSR).A1 (or
A2 it) serves as in the case where making LER, node B1 (or B2), which is served as, makees LSR.In the case where A1 (or A2) is run not as LER,
LER functionality is provided by node B1 (or B2).
Mobile node B 1, B2 are via mobile communications network 1 --- especially via the radio net of mobile communications network 1
Part 2 --- it is connected to mobile base station C1, C2.The mobile network 1 can be the network for example similar to LTE.The mobile network
It is preferably able to encapsulation MPLS packet and by these MPLS packets of air interface transmission.It is according to the present invention by MPLS header from first
The method that node N1 (N1 is in accordance with B1 in the present embodiment) is transmitted to second node N2 (N2 is in accordance with C1 in the present embodiment), restriction pass through
Encapsulation of the LTE network to MPLS packet.Referring to the description below with reference to Fig. 2.
It is received by MPLS coating node C1 (or C2) that air interface transmits.These nodes can remove the envelope of MPLS packet
It fills and they is forwarded to node D1 (or D2).Node C1 (and C2), which is served as, makees LSR router.Node D1 (and D2) serves as work
Conventional MPLS LSR node.Many D1 nodes can cascade.
Node E is MPLS LSR node, and interior joint C1-D1 and C2-D2 gather together for the first time.Node chain C1-D1-
E is typically based on optical fiber to realize big bandwidth and low transmission delay.Node E is sent to section from a node such as C1 in MPLS connection
It plays an important role in the point such as mobile context of C2.
Node F MPLS LER or LSR.The node serves as the interface made towards node A3.If node A3
It is that MPLS allows node, node F, which is served as, makees LSR.In the case where node A3 is not that MPLS allows, node F, which is served as, makees LER.
Node described in the present invention is understood as the logical node being incorporated in integrated physical node.Some combinations
It is possible:
- node D1 and E can be bonded in one or more physical nodes.
- node C1, D1 and E is in one or more physical nodes.
- node A1 and B1 can be bonded in individual node.
- node F and A3 can be bonded in individual node.
Node H is responsible for needing situation of movement when its wireless connectivity is moved to C2 from C1 as node such as B1, and
The MPLS connection being maintained between A1 and A2 or A3.Node H, which is served as, makees mobility control device, indicates when to need to the node being related to
Modify the MPLS connection on node.The MPLS switching part that is transmitted in of movable MPLS connection is described.
There are the preconditions in some processing paths MPLS:
- node A1, B1, C1, D1, A2, B2, C2, D2, E, F, A3 and H have different routable ip address.This allows
Node is for participating in each node in the path MPLS with unique identifier.The IP address of node B1 and B2 are assigned to mark
A part that quasi- LTE connection is established.
- node B1, C1, D1, E and F can route IP packet, be capable of handling Interior Gateway Protocol (IGP) such as OSPF, IS-
IS or RIP is capable of handling mpls protocol such as LDP and RSVP-TE.These nodes can propagate routing iinformation, and can hold
The step of row needs is retained with establishing the path MPLS such as resource.
If-node A3, other than mobile operator IP network, node E or node F can further run eBGP.So
And this requires additional extension to eBGP and MPLS outside the scope of the present invention.
If-node A1 (or A2) is other than mobile operator IP network, node B1 (or node B2) can be transported further
Row eBGP.However, this requires additional extension to eBGP and MPLS outside the scope of the present invention.
Fig. 2 diagrammatically illustrates the schematic diagram of the protocol stack of MPLS frame according to the present invention and is used for transmission MPLS header 24
Method.The method of transmission MPLS header 24 includes the steps that modifying and going modification MPLS header 24.Hereinafter, these steps
It is also known as encapsulating and going encapsulation MPLS header 24.
The signal illustrated in Fig. 2 is shown through the radio network part 2 of mobile network 1 from mobile node B (this reality
Apply the first node N1 in example) it flow to mobile base station C1 (present invention in second node N2) as Label Switch Router
MPLS frame 21 and data 22.From second node N2 (C) to first node N1, the flow direction of (B) will be similar type, wherein
Node C will execute 28 function of MPLS PDPC layer of node B as shown, and vice versa.
The main purpose of MPLS encapsulation is by reducing MPLS header 24 to save the bandwidth of interface in the sky, thus base
A mechanism is established to detect the loss of interface in the sky in serial number 26, and protects data integrity.
By reducing MPLS header size, the bandwidth of interface in the sky is saved.The present invention utilizes following fact, that is, warp
Private radio charge carrier is utilized by the path MPLS 30 that air interface is established.The radio bearer can be unidirectional 22 (uplink
Road or downlink) or two-way 23 (both direction) form.
MPLS header 24 has 4 elementary fields: 20 labels, 4 control sequences and 8 TTL fields.Pass through
MPLS 20 labels are eliminated in the amendment step that label reduces 25, MPLS header 24 can executed by first node N1
It is reduced in 28 function of MPLS PDPC layer, is corresponded this is because existing between the path 22,23 and MPLS of carrier 30.This
The MPLS header 24 of a 12 reduced bit lengths is produced, is made of 4 control bits and 8 life spans.
4 serial numbers 26 are added into the reduced MPLS header (12).The serial number 26 is wait carrier to be passed through
It is 0 on the first MPLS frame sent, and is incremented by next each MPLS frame with 1.This leads to one 16 new
MLPS header 24, in which: 4 are used to carry initial MPLS control bit for serial number 26,4, and 8 initial for carrying
Ttl field.The MPLS PDPC entity that serial number 26 can be received is used for Detectability loss, and rearranges received data.
Serial number 26 can also be used in the acknowledgement mechanism (rlc layer 29 in LTE situation) for managing timer and cutting optimal.
It is applied to PDPC layers of MPLS of encryption mechanism 27 and specified identical for the encryption of LTE situation of 3GPP.This is existing
There is technology, is not described in detail herein.
Control of the use of MPLS header reduction mechanism and encryption mechanism by node B and node C.Both of which can be matched
It is set to and is not used.In the case where being not used, only serial number 26 is increased to initial MPLS frame 24, reduces without header
Or encryption occurs.
In remote location, mobile device such as B encapsulates MPLS frame so that they are sent to node C.Encapsulation passes through removal
MPLS label increases serial number 26 and 27 (if being configured to be encrypted) Lai Zhihang of application encryption.These are packed
MPLS frame 24 then can be mapped to LTE logic channel and LTE physical channel.
In node C, packed MPLS frame 24 is gone to encapsulate in going amendment step 35.If being configured for having inspected
Whole property then makes received frame by integrity check 37 by verifying cryptographic integrity.It is unordered by checkout sequence number 26
MPLS frame is reordered, to be sent by sequential order to upper layer.Before MPLS frame is forwarded to next node, node C
35MPLS label is constructed by increasing suitable MPLS label.The label is configured by control layer in carrier establishment stage.It is reporting
After head structure, MPLS frame can be forwarded according to MPLS process such as Tag switching.
With similar type, the packet for being sent to node B from node C is packed in node C, and is gone to encapsulate in node B.
According to the first embodiment of the invention Fig. 3 is diagrammatically illustrated for establishing the process of the method in the path MPLS
Figure.The path MPLS between node A1 (first node) and A3 (second node) can be initiated by A1 or A3.In two kinds of situations
In, tag distribution protocol such as LDP or RSVP-TE be used to request to distribute the path MPLS along the node related to.?
The path MPLS is by node A1 and in the case where not a node A3 is initiated, the information that exchanges between the node for establishing the path MPLS
There are some small differences in stream.These differences are highlighted explanation at the part ending.
The special duty for establishing MPLS connection is executed by the node E with reference to figure of Fig. 1.Node E is anchored the path MPLS
In terms of mobility and the quick rerouting of mpls protocol is protected.All MPLS connections to be established via LTE air interface
Node E must all be passed through.There can be multiple node E in the entire network.However, it is necessary to there is the node of type E always.
When connection is established, the path MPLS is set up as two discrete paths.One path covering is from node B1 to section
The movable part of point E, another path are covered from node E to the part of node F.Node E by two set of paths together.
As described by the information flow chart of Fig. 3, executes and established from node A3 to the connection of node A1.Each step is described below
It is rapid:
Step 1 and 2 is that MPLS standard meets:
1.A3 manages control protocol via LDP/RSVP-TE or another MPLS label and signals to node F, and one new
The path MPLS should be set up to node A1.Previous routing advance notice, which is assumed, has signaled, and is reachable section via node E and F
Point A1's.
2. node F processing asks this for the LPD/RSVP-TE in new path or the request of another MPLS control protocol
It asks and is sent to node E.
Step 3 is neither MPLS is also not LTE standard meets:
3. establishing other agreement requests of the LDP/RSVP-TE/ in the path MPLS in mobile network once receiving, node E is just
It examines its routing table and identifies node B1 and predict a routing to node A1.In order to which detection node B1 is connected in mobile network
Which node C, node E sends a paging request to node B1 to node H.
Step 4-7 is that LTE standard meets:
4. node H sends a paging request to node B1 to node C1.
5. node C1 pages node B1.
6. node B1 executes discrimination process with node H if necessary to identify.
7. node B1 and C1 establish a LTE logically and physically radio bearer.
Step 8 and 9 is neither MPLS is also not LTE standard meets:
8. the scene (context) that node C1 notifies new carrier to node H.The scene is in addition to LTE air interface scene
It in addition, further include for the identifier for connection management and the MPLS carrier of switching.The MPLS carrier includes C1 identifier, with
And for the identifier to the air interface carrier used for the path MPLS.
9. node H is provided to node E and should be established via node C1 to section as a part of the response for paging request
The information of the routing of point B1.By examining its internal routing table, node E determines that the path MPLS should reach C1 by node D1.
Step 10 is that MPLS standard meets to 11:
10. node E forwards MPLS path request to node D1 via LDP/RSVP-TE or another MPLS control protocol.
11. node D1 forwards MPLS path request to node C1.
Step 12 is neither MPLS is also not LTE standard meets:
12. node C1 receives the MPLS path request to node A1 and identifies and has been set up to not used via B1
The MPLS carrier of node B1.Node C1 associates the MPLS path request come in established MPLS carrier.Node C1
MPLS path request is forwarded to node B1 via LPD/RSVP-TE or another MPLS control protocol.However, without MPLS label quilt
Distribute to C1-B1 interface.
Step 13 and 14 is that MPLS standard meets:
13. node B1 forwards MPLS path request to node A1 via LPD/RSVP-TE or another MPLS control protocol.
14. node A1 confirms the path MPLS via LPD/RSVP-TE or another MPLS control protocol.
Step 15 is neither MPLS is also not LTE standard meets:
15. node B1 forwards the confirmation of the path MPLS, however, being assigned to the interface of B1 to C1 without label.
Step 16 is that MPLS standard meets to 17:
16. node C1 confirms the path MPLS via LPD/RSVP-TE or another MPLS control protocol.
18. node D1 confirms the path MPLS via LPD/RSVP-TE or another MPLS control protocol.Once node E from
LDP/RSVP-TE or another MPLS control protocol receive path and have been successfully established the response until node A1, then node E
It will be to the information for being connected, and node H being notified to establish about the path MPLS on the path of A1 and the Path Logical to A3.
Step 19 is that MPLS standard meets to 20:
19. node E confirms the path MPLS via LPD/RSVP-TE or another MPLS control protocol.
20. node F confirms the path MPLS via LPD/RSVP-TE or another MPLS control protocol.
Fig. 4 diagrammatically illustrates the process of method of the second embodiment according to the present invention for establishing the path MPLS
Figure.In the case where connection is initiated by A1 rather than A3 is initiated, compared with Fig. 3, there is variation in information flow.The information flow is depicted in
In Fig. 4.Each step is described below:
Step 1 is that MPLS standard meets:
1.A1 manages control protocol via LDP/RSVP-TE or another MPLS label and signals to node B1, and one new
The path MPLS should be set up to node A3.Previously, node B1 must be signaled by IGP Routing Protocol, it can be to node
A3 provides routing.
Step 2 and 3 is that LTE standard meets:
2. if desired, node B1 executes identification to node H.
3. node B1 and node C1 establishes new logically and physically radio bearer.
Step 4 and 5 is neither MPLS is also not LTE standard meets:
4. the scene that node C1 notifies new carrier to node H.The scene is also wrapped other than LTE air interface scene
It includes for the identifier for connection management and the MPLS carrier of switching.
5. node B1 signals via LDP/RSVP-TE/ or another MPLS label management control protocol, should be built to node A3
The vertical path MPLS.However, being assigned to B1c*C1 interface without MPLS label.
Step 6 is that MPLS standard meets to 13:
6. node C1 requests the path MPLS to node A3.
7. node D1 requests the path MPLS to node A3.
8. node E requests the path MPLS to node A3.
9. node F requests the path MPLS to node A3.
10. node A3 confirms the path MPLS to node A3.
11. node F confirms the path MPLS to node A3.
12. node E confirms the path MPLS to node A3.
13. node D1 confirms the path MPLS to node A3.
Step 14 is neither MPLS is also not LTE standard meets:
14. node C1 notice node H has been set up by the path MPLS of signal of carrier symbol mark.
Step 15 is that MPLS standard meets to 16:
15. node C1 confirms the path MPLS to node A3.
16. node B1 confirms the path MPLS to node A3.
Fig. 5 diagrammatically illustrates the method for the switching for according to the third embodiment of the invention being used to execute the path MPLS
Flow chart.Even if mobility is that remote node B1 or B2 still is able to be connected to when being moved to another position from a position
The ability of wireless network.Process required by mobility is provided to be provided by LTE mobility.Unique exception is for the road MPLS
In the case where the movable carrier of diameter.MPLS detailed process according to the present invention in this case is described below.
Mobile node persistently scans LTE radio-frequency spectrum, is being detected with detecting which LTE radio signal, and
To these signals of base station report.These reports be used to determine that the switching from a cell to another cell should be carried out.LTE without
Line electric signal may deteriorate, this is because or mobile node physics is mobile or because can provide in one cell
Resource have become insufficient.
MPLS handoff procedure is consistent with the process used in LTE for the switching of IP packet.However, there are some differences, especially
It is in handoff procedure when establishing MPLS connectivity.The present invention describes the applicable situation of these differences.
Fig. 5 describes MPLS and switches the information flow being related to.Before MPLS switching, from node A1 to node B1, from node
There are the transmission of MPLS frame via air interface to node C1 by B1, between node C1 and D1 and between node D1 and E,
Between node E and F, there are the paths MPLS between node F and A3.After MPLS switching, from node A1 to node B1, from section
There are the transmission of MPLS frame via air interface to node C2 by point B1, between node C2 and D2 and between node D2 and E,
Between node E and F, there are the paths MPLS between node F and A3.
Step 1 is that LTE standard meets:
1. node B1 periodically measures radio signal, and provides these reports measured to node C1.
Step 2 is to 4 neither MPLS is also not LTE standard meets:
2. node C1 determines that switching is better than continuing resident C1.The decision standard switched over is not a part of the invention.
Node C1 notifies node H: the MPLS Protection path via node C2 to node E is needed for node B1, to be protected from B1 warp
By the failure in the path of C1 to E.
3. node H requesting node E for B1 establish via node C2 MPLS Protection path, as it is existing via
The MPLS Protection path in the path MPLS of C1 to B1.
4. it is accessibility that node E, which examines its IP route table and identifies node C2 via node D2,.Node E request via
The MPLS Protection path of node D2 to node C2.It follows RSVP-TE and quickly re-routes agreement, which is set up as
MPLS backup tunnel.MPLS protection is implemented as the MPLS local route repair of the path the MPLS connection for A1 to A3, is protected from
Along the failure of the path MPLS B1 to C1, C1 to D1 and D1 to E.Node E is the merging that two paths MPLS merge again
Point.
Step 5 is the confirmation of MPLS standard:
5. node D2 requests MPLS Protection path to node C2.
Step 6 is neither MPLS is also not LTE standard meets:
6. replacing the RSVP-TE request for requiring MPLS to protect to node B1 forwarding, node C2 confirms that MPLS protects road immediately
Diameter.Node C2 keeps the internal reference for the path MPLS, the expected path MPLS to node B1 being switched of protection.
Step 7 is the confirmation of MPLS standard:
7. node D2 confirms MPLS Protection path.
Step 8 and 9 is neither MPLS is also not LTE standard meets:
8. node E receives confirmation and has built up the path local route repair MPLS, it is protected from the failure of B1 to C1 interface.Node
E notice node H has built up the Protection path of node B1.
9. node H notice node C1 has built up to the protection to the path MPLS of B1.
Step 10 is that part LTE standard meets, but extends with important to support MPLS to switch required parameter to 13:
10. node C1 notifies thing of the node C2 about switching, and transmits relevant parameter.
11. node C2 confirms switching capability to node C1.Node C2 mark is previously configured for the MPLS protection of switching
Path.
12. node C1 notice node B1 switches to node C2.
13. node B1 is connected to node C2.As the shielded path MPLS having built up before handover, from node
The MPLS packet of A1 to A3 can continue to flow, by MPLS trail protection.RSVP-TE quickly re-route agreement ensure it is all
MPLS frame will comply with the Protection path via C2 rather than via the initial path MPLS of node C1.
Step 14 and 15 is neither MPLS is also not LTE standard meets:
14. node C2 notifies node H successfully to transmit MPLS carrier, and should update MPLS signal of carrier symbol.
15. node H requires node E to delete the path MPLS from node E to node C1.
Step 16 and 17 is that MPLS standard meets:
16. node E requires node D1 to delete the path MPLS.
17. node D1 requires node C1 to delete the path MPLS.
Although only describing some embodiments of the invention herein, it will be understood by those skilled in the art that without departing from this
In the case where the broad purport of invention, many other modifications of the invention, modification and possible scheme are also possible.Therefore,
These modification, modification and may scheme be considered falling in the spirit and scope of the invention, thus constitute such as be described herein and/or
The a part of the invention illustrated.As a result, the description and the appended drawings should be considered as it is exemplary and not restrictive.
Aspect 1. is via radio circuit (1,2) --- especially via long term evolution (LTE) network, by multi-protocols mark
The method that label exchange (MPLS) header (24) is transmitted to second node (N2, C1, B1) from first node (N1, B1, C1), the side
Method the following steps are included:
- by the size of the reduction multiprotocol label switching header (24), modify the multiprotocol label switching header
(24), and
- using private radio charge carrier by air interface by modified multiprotocol label switching header (24) from institute
It states first node (N1, B1, C1) and is transmitted to the second node (N2, C1, B1).
The method according to aspect 1 of aspect 2., wherein the size of the multiprotocol label switching header (24) passes through shifting
Except the position the MPLS label of the multiprotocol label switching header (24) is reduced.
Aspect 3. is via radio circuit (1,2) --- especially via LTE (long term evolution) network, by multi-protocols mark
The method that label exchange (MPLS) header (24) is transmitted to second node (N2, C1, B1) from first node (N1, B1, C1), preferably root
According to one of aspect 1 or 2, the described method comprises the following steps:
- by increasing a serial number (26) to the multiprotocol label switching header (24), modify the multi-protocols mark
Label exchange header (24), and
- using private radio charge carrier by air interface by modified multiprotocol label switching header (24) from institute
It states first node (N1, B1, C1) and is transmitted to the second node (N2, C1, B1).
The method according to aspect 3 of aspect 4., wherein by adding to the multiprotocol label switching header (24) application
Close mechanism (27) further modifies the multiprotocol label switching header (24).
The method according to one of aforementioned aspects of aspect 5., further includes steps of
- pass through the first node (N1, B1, C1) broadcast modified multiprotocol label switching header (24),
- pass through the second node (N2, C1, B1) reception modified multiprotocol label switching header (24),
- go the received multiprotocol label switching header (24) of modification institute.
The method according to aspect 5 of aspect 6., wherein the received multiprotocol label switching header (24) of institute is by institute
It states MPLS labels of multiprotocol label switching header (24) increase to be gone to modify, the MPLS label advantageously relies upon the warp
The control layer of the multiprotocol label switching header (24) of modification is configured;And/or the wherein received multiprotocol label switching report of institute
Head (24) is reordered according to serial number (26);And/or the multiprotocol label switching header (24) being wherein reordered is logical
It crosses and removes the serial number (26) and gone to modify;And/or wherein received multiprotocol label switching header (24) integrality
It is examined by verifying cryptographic integrity;And/or wherein the received multiprotocol label switching header of institute pass through it is received to the institute
Multiprotocol label switching header (24) is gone to modify using decryption mechanisms (37).
The method according to one of aforementioned aspects of aspect 7., wherein the multiprotocol label switching header (24) is by described
First node (N1, B1, C1) modification, and wherein the modified multiprotocol label switching header (24) by second section
Point (N2, C1, B1) goes to modify, wherein the first node (N1, B1, C1) preferably includes mobile node (B1), and/or wherein institute
It states second node (N2, C1, B1) and preferably includes the first Label Switch Router (LSR) (C1).
Aspect 8. establishes the path multiprotocol label switching (MPLS) between first node (A1) and second node (A3)
Method, this method is by multiprotocol label switching (MPLS) by the wireline side (3) of mobile network (1) and by drilling for a long time
The radio network part (2) for passing through the mobile network (1) into (LTE) radio bearer, the described method comprises the following steps:
- the first movement node (B1) for being connected directly or indirectly to the first node (A1) with directly or indirectly connect
It is connected between the first Label Switch Router (C1) of the second node (A3) and establishes LTE radio bearer,
- the radio net portion will be transmitted to from an identifier of first Label Switch Router (C1)
Mobile network's controller (H) for dividing (2), wherein the identifier includes about wait be used in the first movement node
(B1) information of the air interface carrier in the path MPLS between first Label Switch Router (C1), and
- by using identifier information via the LTE radio bearer in the first node (A1) and described second
The path MPLS is partly established between node (A3).
The method according to aspect 8 of aspect 9., wherein first Label Switch Router (C1) notifies the movement
Network controller (H): the path MPLS that the identifier information is identified has been established, and/or wherein the path MPLS asks
It asks and is initially generated by the first node (A1), and wherein between the first node (A1) and the second node (A3)
The path MPLS have built up after, second node (A3) the Xiang Suoshu first node (A1) confirms the path MPLS.
The method that aspect 10. establishes the path MPLS between first node (A1) and second node (A3), this method by
Multiprotocol label switching (MPLS) passes through the wireline side (3) of mobile network (1) and carries by long term evolution (LTE) radio
Body passes through the radio network part (2) of the mobile network (1), the described method comprises the following steps:
- in the first movement node (B1) and the first Tag switching for being connected directly or indirectly to the first node (A1)
LTE radio bearer is established between router (C1),
- identifier of first Label Switch Router (C1) will be come from via the radio network part
Mobile network's controller (H) be transmitted to another Tag switching for being connected directly or indirectly to the second node (A3)
Router (E),
- by using the identifier via another described Label Switch Router (E), first Tag switching
Router (C1) and the first movement node (B1) establish the path MPLS between first node (A1) and second node (A3),
- wherein identifier instruction need to establish the road MPLS via first Label Switch Router (C1)
Diameter, and
- wherein the identifier include about wait be used for the first movement node (B1) and first label friendship
Change the information of the air interface carrier in the path MPLS between router (C1).
The method according to aspect 10 of aspect 11., one of MPLS path request is by from another Tag switching
Router (E) is transmitted to first Label Switch Router (C1), and wherein first Label Switch Router (C1)
The MPLS path request come in is associated with the MPLS carrier of foundation, and the MPLS path request is transmitted to described first
Mobile node (B1).
The method according to one of aspect 10 or 11 of aspect 12., wherein first Label Switch Router (C1) is logical
Know mobile network's controller (H): the path MPLS identified by the identifier information has been established, and/or wherein institute
It states MPLS path request initially to be generated by the second node (A3), and wherein in the first node (A1) and described second
After the path MPLS between node (A3) has built up, first node (A1) the Xiang Suoshu second node (A3) confirms MPLS
Path.
13. pairs of aspect roads multiprotocol label switching (MPLS) established between first node (A1) and second node (A3)
Diameter --- especially to the path multiprotocol label switching (MPLS) established according to the method for one of aspect 8 to 12 --- execution is cut
The method changed, this method is by multiprotocol label switching (MPLS) by the wireline side (3) of mobile network (1) and by length
Phase evolution (LTE) radio bearer passes through the radio network part (2) of the mobile network (1), and this method includes following step
It is rapid:
- by be connected directly or indirectly to the first node (A1) first movement node (B1) measure aerogram
Number, and via another Label Switch Router (E) to the first Tag switching for being indirectly connected to the second node (A3)
Router (C1) provides the information about measured radio signal,
If-first Label Switch Router (C1) needs to switch based on measured radio signal determination,
The switching command of first Label Switch Router (C1) will be come from via a mobile network of the radio network part
Network controller (H) is transferred to another described Label Switch Router (E), wherein the switching command is needed comprising the path MPLS
Via the information that the second Label Switch Router (C2) is redirected,
- dependent on the received switching command of institute, MPLS request is transmitted from another described Label Switch Router (E)
To second Label Switch Router (C2),
- handoff parameter is transferred to second Label Switch Router from first Label Switch Router (C1)
(C2),
- LTE radio is established between the first movement node (B1) and second Label Switch Router (C2)
Carrier,
- will be controlled from the identifier more newer command of second Label Switch Router (C2) via the mobile network
Device (H) processed is transferred to another described Label Switch Router (E), and
- via another described Label Switch Router (E), second Label Switch Router (C2) and described
One mobile node (B1) establishes the path MPLS between first node (A1) and second node (A3).
The method according to aspect 13 of aspect 14., wherein dependent on a received identifier more newer command, it is described another
A Label Switch Router (E) deletes the path MPLS for arriving first Label Switch Router (C1).
The method according to one of aspect 8 to 14 of aspect 15., wherein via mobile node (B1) and first or second mark
The path MPLS between Switch Router (C1, C2) is signed, is handed over by transmitting multiprotocol label according to the method for one of aspect 1 to 7
Change (MPLS) header.
Claims (14)
1. via radio circuit (1,2) by multiprotocol label switching (MPLS) header (24) from first node (N1, B1,
C1 the method for) being transmitted to second node (N2, C1, B1), the radio circuit (1,2) include long term evolution (LTE) net
Network the described method comprises the following steps:
- by reducing the size of the multiprotocol label switching header (24) and to the multiprotocol label switching header
(24) increase a serial number (26), modify the multiprotocol label switching header (24), wherein the serial number is for detecting
The loss of interface and the integrality by analyzing serial number received MPLS data to verify in the sky;And
- using private radio charge carrier by air interface by modified multiprotocol label switching header (24) from described the
One node (N1, B1, C1) is transmitted to the second node (N2, C1, B1).
2. according to the method described in claim 1, wherein the size of the multiprotocol label switching header (24) is by removing institute
The position the MPLS label for stating multiprotocol label switching header (24) is reduced.
3. according to the method described in claim 1, wherein by applying encryption equipment to the multiprotocol label switching header (24)
It makes (27), further modifies the multiprotocol label switching header (24).
4. according to the method described in claim 1, further including steps of
- pass through the first node (N1, B1, C1) broadcast modified multiprotocol label switching header (24),
- pass through the second node (N2, C1, B1) reception modified multiprotocol label switching header (24),
- go the received multiprotocol label switching header (24) of modification institute.
5. according to the method described in claim 4, wherein the received multiprotocol label switching header (24) of institute is by described more
Protocol label exchange header (24) increases MPLS labels and is gone to modify, and the MPLS label is dependent on described modified more
The control layer of protocol label exchange header (24) is configured;And/or wherein received multiprotocol label switching header (24) root of institute
It is reordered according to serial number (26);And/or the multiprotocol label switching header (24) being wherein reordered passes through removal institute
Serial number (26) is stated to be gone to modify;And/or wherein the integrality of received multiprotocol label switching header (24) pass through verifying
Cryptographic integrity is examined;And/or wherein the received multiprotocol label switching header of institute by the received multi-protocols mark of the institute
Label exchange header (24) is gone to modify using decryption mechanisms (37).
6. method according to claim 1 or 2, wherein the multiprotocol label switching header (24) is by described
First node (N1, B1, C1) modification, and wherein the modified multiprotocol label switching header (24) by second section
Point (N2, C1, B1) goes to modify, wherein the first node (N1, B1, C1) includes mobile node (B1), and/or wherein described
Two nodes (N2, C1, B1) include the first Label Switch Router (LSR) (C1).
7. according to the method described in claim 1, wherein, multiprotocol label switching (MPLS) header (24) is via more associations
Discuss Tag switching (MPLS) path transmission, wherein the multiprotocol label switching path (MPLS) in first node (A1) and
Established between second node (A3), by multiprotocol label switching (MPLS) by the wireline side (3) of mobile network (1) and
Pass through the radio network part (2) of the mobile network (1), the foundation packet by long term evolution (LTE) radio bearer
Include following steps:
- the first movement node (B1) for being connected directly or indirectly to the first node (A1) be connected directly or indirectly to
LTE radio bearer is established between the first Label Switch Router (C1) of the second node (A3),
- radio network part (2) will be transmitted to from an identifier of first Label Switch Router (C1)
Mobile network's controller (H), wherein the identifier includes about wait be used in the first movement node (B1)
The information of the air interface carrier in the path MPLS between first Label Switch Router (C1), and
- by using identifier information partly via the LTE radio bearer in the first node (A1) and described
The path MPLS is established between two nodes (A3).
8. according to the method described in claim 7, wherein first Label Switch Router (C1) notifies the mobile network
Controller (H): the path MPLS that the identifier information is identified has been established, and/or wherein MPLS path request initially by
The first node (A1) generates, and the wherein road MPLS between the first node (A1) and the second node (A3)
After diameter has built up, second node (A3) the Xiang Suoshu first node (A1) confirms the path MPLS.
9. according to the method described in claim 1, wherein, multiprotocol label switching (MPLS) header (24) is via more associations
Discuss Tag switching (MPLS) path transmission, wherein the multiprotocol label switching path (MPLS) in first node (A1) and
Established between second node (A3), by multiprotocol label switching (MPLS) by the wireline side (3) of mobile network (1) and
Pass through the radio network part (2) of the mobile network (1), the foundation packet by long term evolution (LTE) radio bearer
Include following steps:
- routed in the first movement node (B1) and the first Tag switching for being connected directly or indirectly to the first node (A1)
LTE radio bearer is established between device (C1),
- identifier of first Label Switch Router (C1) will be come from via the one of the radio network part
A mobile network's controller (H) is transmitted to another Tag switching routing for being connected directly or indirectly to the second node (A3)
Device (E),
- routed by using the identifier via another described Label Switch Router (E), first Tag switching
Device (C1) and the first movement node (B1) establish the path MPLS between first node (A1) and second node (A3),
- wherein identifier instruction need to establish the path MPLS via first Label Switch Router (C1), with
And
- wherein the identifier include about wait be used for the first movement node (B1) and first tag changeable path
By the information of the air interface carrier in the path MPLS between device (C1).
10. according to the method described in claim 9, one of MPLS path request is by from another Label Switch Router
(E) it is transmitted to first Label Switch Router (C1), and wherein first Label Switch Router (C1) will be come in
MPLS path request be associated with the MPLS carrier of foundation, and the MPLS path request is transmitted to the first movement section
Point (B1).
11. the method according to one of claim 9 or 10, wherein described in first Label Switch Router (C1) notice
Mobile network's controller (H): the path MPLS identified by the identifier information has been established, and/or the wherein MPLS
Path request is initially generated by the second node (A3), and wherein in the first node (A1) and the second node
(A3) after the path MPLS between has built up, first node (A1) the Xiang Suoshu second node (A3) confirms the road MPLS
Diameter.
12. pair multiprotocol label switching path (MPLS) established between first node (A1) and second node (A3) executes and cuts
The method changed, the method for executing the switching pass through the wired of mobile network (1) by multiprotocol label switching (MPLS)
Partially (3) and by long term evolution (LTE) radio bearer by the radio network part (2) of the mobile network (1),
Multiprotocol label switching (MPLS) path is that the method according to any one of claim 7 or 9 is established, for holding
The method of the row switching the following steps are included:
- by be connected directly or indirectly to the first node (A1) first movement node (B1) measure radio signal, and
And via another Label Switch Router (E) to the first Label Switch Router for being indirectly connected to the second node (A3)
(C1) information about measured radio signal is provided,
If-first Label Switch Router (C1) needs to switch based on measured radio signal determination, in the future
It is controlled from the switching command of first Label Switch Router (C1) via a mobile network of the radio network part
Device (H) processed is transferred to another described Label Switch Router (E), wherein the switching command include the path MPLS need via
The information that second Label Switch Router (C2) is redirected,
- dependent on the received switching command of institute, MPLS is requested to be transferred to institute from another described Label Switch Router (E)
The second Label Switch Router (C2) is stated,
- handoff parameter is transferred to second Label Switch Router (C2) from first Label Switch Router (C1),
- LTE radio load is established between the first movement node (B1) and second Label Switch Router (C2)
Body,
- the identifier more newer command of second Label Switch Router (C2) will be come from via mobile network's controller
(H) it is transferred to another described Label Switch Router (E), and
- moved via another described Label Switch Router (E), second Label Switch Router (C2) and described first
Dynamic node (B1) establishes the path MPLS between first node (A1) and second node (A3).
13. according to the method for claim 12, wherein dependent on the received identifier more newer command of institute, another described mark
It signs Switch Router (E) and deletes the path MPLS for arriving first Label Switch Router (C1).
14. the method according to any one of claim 7 or 9, wherein via mobile node (B1) and the first Tag switching
Multiprotocol label switching is transmitted by the method according to claim 1 to one of 6 in the path MPLS between router (C1)
(MPLS) header.
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CN201510009421.5A CN104735746B (en) | 2011-04-13 | 2011-04-13 | It is used for transmission the method for MPLS header, the method for establishing the path MPLS and the method for executing the switching of the path MPLS |
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CN1575581A (en) * | 2001-10-22 | 2005-02-02 | 西门子公司 | Method and device for mapping network headers onto mpls headers in bearer architectures |
CN1881908A (en) * | 2005-06-13 | 2006-12-20 | 华为技术有限公司 | Method for measuring MPLS network performance parameter |
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